378 PLANTING LIST 



them in their beds in spring or fall, six inches or more apart, and give 

 clean culture. In winter they need protection of some kind ; they 

 will often bloom in very cold weather when under a cold-frame ; 

 but they need ventilation. Set in the edges of the border, or under 

 shrubs, violets will usually increase from seed or runners without 

 much care, and will blossom freely in the spring. 



Wallflowers: Annual or perennial plants of considerable value 

 for their old-fashioned effect in bedding; the flowers are yellows 

 and browns, with modern varieties in white and red; they are 

 sweet-scented, and are borne very freely in early summer. Sow 

 early under glass, or outdoors after the middle of May ; set the 

 plants nine inches or more apart. Or sow freshly ripe seed of 

 perennial varieties in summer, water well, and set out in September, 

 protecting in winter. Wallflowers are tender. 



Watermelons : Grown much like Muskmelons, except that they 

 need more space, six feet if possible. For the north only the early 

 varieties should be grown, except on very light and early soil, and 

 after starting under glass. Do not let the plants set more than one 

 fruit to a branch. The soil should not have much nitrogen, or they 

 will run to vine. 



Youth and Old Age, see Zinnia. 



Yucca : A tropical perennial plant, which strangely enough is very 

 hardy, and is worth having in the garden for the sake of its foliage 

 alone, and the contrast of its stiff, sword-like leaves with the more 

 graceful foliage of our northern plants. But besides this, Yucca 

 flowers very beautifully, sending up in midsummer a tall stalk 

 with clusters of waxy cream-white flowers, which are very handsome. 

 It can be raised from seed, which should be sowed in any light soil 

 in May, and planted out finally about the end of June, distances 

 two feet or more apart. On the plants form offsets, which in spring 

 may be cut away and set separately. These young plants may be 

 bought of seedsmen. The exposure for Yucca should be sunny. 

 Filamentosa is the variety which is most successful in the north; 

 it is frequently called Adam's Needle. 



